Pulley



'(No Model.)

H. -H. THO'RP.

PULLBY. No. 393,041. Patented Nov. 20, 1888.

NirE` STATES;

HENRXT H. THoEP, or CLEVELAND, omo.

PULLEY.

SPECIFICATION forming part-of Letters Patent No. 393,041, dated November20, 1888.

Application filed October 18, 1886. Serial No. 216,488.

To all whom, t may concern:

Be it known that I, HENRY H. THORP, a citizen of the UnitedStates,residing at Cleveland, in the county of Cuyahoga and State of Ohio, haveinvented certain new and useful Improvements in Pulleys; and I do herebydeclare that the following` is a full, clear, and exact descriptionofthe invention, which will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to improvements in pulleys; audit consists,broadly, iu providing a pulley with a removable metallic band formed ina single piece, all as shown and de scribed, and particularly pointedout in the claims.

In the accompanying drawings,Figure l represents a side elevation of asectional pulley with my improved form of band attached. Fig. 2 is aperspective view of the band alone.

Referring to Fig. 1, a a represent the respective sections of a form ofsplit pulley embodying my invention. In this view are shown two sectionssuitably cored to form the bore of the hub, and having flanges a a',through which the sections are bolted together, and rims c3 integraltherewith,which form the pe riphery of the wheel.

b b' and c c represent inwardly-projecting lugs cast integral with therim c3 on the opposing edges of the respective sections. The faces ofthese lugs are dat; but the lugs b b are beveled from their innerextremity toward the periphery of the wheel,substautially as shown'inFig. l, so that when the sections are brought together the lugs willlform a fulcrum for tightening the band, as hereinafter described.

If preferred, the lugs b b may be provided with circular faces insteadof straight ones, and act on the principle of a cam. The lugs c c', onthe contrary, come closely together when the sections are united, andhave transverse diagonal slots cZ c2 near their upper corners. Theselugs need onlybe large enough to enable me to cut the slots cl therein.

D represents a metallic band, preferably made of steel, although othersuitable sheet metal may be used. This band is formed in a single pieceof any desired width and proI (No model.)

vided with inwardlyturned ends d cl,adapted to occupy the slots c2 0*.

Different forms of wheels might be adopted and be within the scope of myinvention, as the construction of the Wheel is not material, provided itbe adapted to receive and hold my improved form` of band. It will beseen that the slots c c' are so arranged in relation to one another thatwhen the band is secured therein and the bolts of the wheel tightenedthe shoulders on the bent ends d d are brought into contact and serve tolock each other from release, thus eftectually holding the band on thewheel and preventing its accidental displacement While the bolts are inposition.

The precise means of securing the band here described need not befollowed, as others may suggest themselves; but I prefer this methodbecause it is cheap aud'convenient and requires no ext-ra bolts orattachments.

By constructing a pulley on the principle herein described and having aband that is easily and quickly removed I am enabled to use differentwidths of band as Well as different forms thereof-such as crown-bandsand straight bands-on the same pulley. This affords a great saving inthe number of pulleys that otherwise would be necessary, as well as muchtime and labor in changing them upon the shaft.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, 1s-

I. Apulley having independent inwardlyprojecting lugs at one side, withthe faces of the lugs set directly opposite eachother, in combinationwith a band secured to the pulley at its ends and adapted to betightened on the pulley by the spreading of the outer faces of the lugs,substantially as set forth.

2. A pulley formed in two sections having independent lugs at one sidewhich form fulcrums for said sections when drawn together, incombination With a band secured to the pulley-sections at one side andadapted to be tightened ou the pulley by the spreading ot' the outerfaces of the lugs in bringing said pulley-sections together,substantially as set forth.

3. A pulley formed in two sections, each having inwardly-projecting lugsat opposite sides, the faces of the lugs being directly opposite eaehother, in combination with a band having its ends bent inwardly andsecured in slots in the pulley-sections, the band being tightened bythespreading of the outer faces of one set of lugs and the other set oflugs posing lugs being in the same plane and the faces of the other lugsin different planes as to each other, substantially as set forth.

5. A sectional pulley provided with fulcrumlugs at one side and bindinglugs for the sections,v and the band on the opposite side, incombination with a band, substantially as set tightly secured together,substantially as set forth. forth. HENRY H. THORP.

NVitnesses:

4. In a sectional pulley, two corresponding l sections, each having twolugs opposite one another, the meeting faces of one set of opl H. T.FISHER, WVM. M. MONROE.

